function drop_down_list()
{
    var os0 = $('#os0').val();

    $('#loading_model_drop_down').show(); // Show the Loading...
	
    $('#model_drop_down').hide(); // Hide the drop down
    $('#no_model_drop_down').hide(); // Hide the "no counties" message (if it's the case)

    $.getScript("js/brands/"+ os0 +".js", function(){

    populate(document.form.os1);

 	$('#loading_model_drop_down').hide(); // Hide the Loading...
	$('#model_drop_down').show(); // Show the drop down
    });
}

$(document).ready(function(){
$("#os0").change(drop_down_list);
});

$(window).load(drop_down_list);